Simplify the Expression $$x ^ { 4 } \cdot x ^ { 2 }$$

Multiple Choice

Simplify the expression. Assume all variables represent nonzero real numbers.
- $$x ^ { 4 } \cdot x ^ { 2 }$$

A) $x ^ { 8 }$
B) $x ^ { 6 }$
C) $( 2 x ) ^ { 6 }$
D) $( 2 x ) ^ { 8 }$